Toothbrush



FIG. 1. is a perspective view of a toothbrush showing my design;

FIG. 2. is a front elevational view thereof;

FIG. 3. is a rear elevational view thereof;

FIG. 4. is a left elevational view thereof;

FIG. 5. is a right elevational view thereof;

FIG. 6. is a top plan view thereof; and,

FIG. 7. is a bottom plan view thereof. 

The ornamental design for a toothbrush, as shown and described. 